STM32F0从I2C程序（经过测试可达到400K的速率）

1、修改stm32f0xx_i2c.h中 I2C_InitTypeDef的结构体，增加 I2C_OwnAddress2 field: typedef struct { ... uint32_t I2C_OwnAddress2; /*!< Specifies the device own address 2. This parameter can be a 7-bit address*/ ... }I2C_InitTypeDef; 2、修改stm32f0xx_i2c_cpal.c function： uint32_t CPAL_I2C_Init(CPAL_InitTypeDef* pDevInitStruct) { ... /* If OA2 Address mode option bit selected */ if ((pDevInitStruct->wCPAL_Options & CPAL_OPT_I2C_DUALADDR) != 0) { /* Configure OA2 */ //__CPAL_I2C_HAL_OA2_CONF(pDevInitStruct->CPAL_Dev, (uint32_t)(pDevInitStruct->wCPAL_Options & 0x000000FE)); __CPAL_I2C_HAL_OA2_CONF(pDevInitStruct->CPAL_Dev, (uint32_t)(pDevInitStruct->pCPAL_I2C_Struct->I2C_OwnAddress2 & 0x000000FE)); ... } }